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维生素C放久后有害 [合众国际社纽约一九七五年五月六日电]维生素C长期暴露于空气和潮湿中,会分解成为有害的物质。旧金山太平大学生化学家威尔克根据三年来对暴露于空气和潮湿中的维生素C片剂
Vitamin C is harmful for long periods of time [New York, May 6, 1975] The long-term exposure of vitamin C to air and moisture can break it down into harmful substances. San Francisco Pacific University chemist Wilk based on three years of exposure to air and moisture in vitamin C tablets